Lifting device for cores.



G. ATTERBURY.

LIPTING DEVICE FOR 0033s. APPLICATION FILED SEPT. 10, 1910.

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UNTTED STATES PATENT @FFTQE.

GROSVENOR ATTERBURY, OF NEW YORK, N. Y.

LIFTING DEVICE FOR OOBES.

oomees.

T 0 all whom it may concern Be it known that I, GRosvENoR A'rrnR- BURY, a citizen of the United States, a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Lifting Devices for Cores, of.

which the following is a specification.

My invention relates to lifting devices for cores used in connection with molding or casting apparatus for forming concrete or cementitious blocks, having openings or voids therein.

The objects of my invention are to provide a lifting device for cores which will reduce to a minimum the amount of time and labor necessary to insert the cores in the casting frame and withdraw them from the block after it has sufficiently hardened to permit their withdrawal and which can be cheaply constructed and will be strong and durable and not liable to get out of order.

My improved lifting device is especially adapted for use with cores of large size. In the system employed by me of building houses of large concrete blocks or sections, it is frequently desirable to cast the blocks or sections the full length of the floors of the rooms or the full length of the walls and roofs and to provide in thema plurality of openings or voids. It is also frequently desirable to cast such blocks or sections in a horizontal position so that the cores must be withdrawn horizontally instead of vertically. The length and weight of the cores used in casting such blocks and sections un der these conditions entails a large amount of labor, in handling the cores, which would prevent the general adoption and use of blocks of such large size. My improved lifting devices provide an easy and simple manner of handling the cores and thus largely obviate these objections.

In the drawings accompanying and forming a part of this specification, I have illustrated one embodiment of my invention.

In these drawings Figure 1 is a side elevation showing the lifting device supporting a plurality of cores used in forming the bloc s or sections on the car adjacent thereto. Fig. 2 is a top plan view of the lifting device. Fig. 3 is a transverse sectional view of the same taken on the line 33 of Fig. 2. Fig. 4 is a detailed view showing one of the core engaging members.

Specification of Letters Patent.

Application filed September 10, 1910.

Patented Nov. 7, 1911. Serial No. 581,342.

The same reference numerals are used throughout the different views to designate the same parts.

The lifting device comprises a frame 1 supported from a movable carriage 2, mounted on the overhead track 3, or crane or other device which may be parallel with the track 4, which carries the car 5 on which the blocks 6 are formed. The frame 1 of the lifting device is provided with two sets or series of vertical depending rods or arms 7, each of which has mounted on its lower end a core engaging member 8. The vertical rods 7 each has a lever 9 mounted thereon and these are connected to two operating members 10. The arrangement is such that by pulling or pushing the members 10, the core engaging members 8 may be rotated so as to assume the position shown in Fig. 2 so that they can be withdrawn,'or into the position shown in Fig. 1 so as to engage the lower sides of the cores and support them.

The operation of the lifting device will be understood from the following description of its use with the apparatus described in my pending application Serial No. 581,340. A casting frame such as is described in that application is placed on the car 5 and the cores 11 placed in the frame. The frame is then filled with concrete, which surrounds the cores. As soon as the concrete has set sufliciently hard, the cores are collapsed and drawn out endwise by hand until they are in position to be engaged by the lifting device. The lifting device is then moved into position over the cores and lowered until the core engaging members 8 have the position shown in Fig. 2. The members 8 are then rotated into engaging position by means of the members 10, and the cores are removed by means of the overhead track. The casting frame on the car is then raised, the cores inserted in the frame by means of the lifting device and a second block cast on top of the first one. This operation, including the removal and inserting of the cores by aid of the lifting device, it carried forward until a suitable number of blocks have been superimposed one on the other on the car and the car is removed to a suitable place and allowed to remain stationary until the blocks thereon have thoroughly set. It is to be understood that the lifting device while it is especially useful with the particular casting apparatus described in my said application and cores herein illustrated and described, yet it may be used to advantage wherever it is necessary to insert and withdraw cores from a casting frame and it may be used with a single core or with a plurality of cores.

While I have illustrated only one embodiment of my invention, I am aware that modifications can be made therein by those skilled in the art without departing from the spirit of my invention or the scope of my claims.

What I claim is:

1. In a device of the kind described, a horizontal frame, vertical arms arranged in rows at the opposite ends of said frame and extending below the same, horizontal supfor rotating the supporting members on each of said rows of vertical arms, substantially as described.

GROSVENOR ATTERBURY. Witnesses:

FREDERICK MAGDEBURG, J osnrrr P. MARSHALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

